29 Jun
2005
29 Jun
'05
7:03 a.m.
Bryan J. Smith wrote:
On Wed, 2005-06-29 at 12:20 +0800, Feizhou wrote:
I thought they have done away with the high memory bounce buffers?
Correct. On x86-64, they have.
Ok earlier you said:
"At more than 1GiB on Linux/x86, you must use a 4G+4G kernel (this is the default) to see more than 960MiB. This causes a signficant (10%+) performance hit. On more than 4GiB, it is worsened as more extensive paging is used."
where does the performance hit for 4G/4G on Intel (whether ia32e or not) come from?